. >> tom: hagel's not a shoe-in for the position. he's received criticism for his record on israel, iran, and gay rights. current defense secretary leon panetta says he will retire when his replacement is approved by the senate. >> tom: tonight we begin a new weekly series here on nbr. we partnered with some of the nation's top universities to bring you the best research on business, the economy and investing. we call it nbru. now our partners in this combine over 400 years of business knowledge. they include harvard university, standford, wharton and vanderbilt universities. each monday we will speak with top professors about key money issues and you can read in-depth at nbr.com, just look for the tab. now we begin our series with the corporate focus on shareholder value. every c.e.o. of a publicly-traded company concentrates on-- most prominently on display every day. that focus on share price hurts the economy, according to margaret blair, a professor at vanderbilt university. professor, is shareholder value first best expressed b